thoroughway noun2 •A way through, passageway.Only at Knossos we have to observe that for the convenience of the palace this corridor has become a thoroughway past the front of the shrine in either direction. — 1908 •A thoroughfare.Today the street is still a central thoroughway through the old city, though now converted to a pedestrian zone and called the Breite Herzog-Strasse. — 1998 formsthoroughways